The legal firm is moving into its new offices at the end of this month.

Sidley Austin more than doubled the size of its Dallas office in October with the addition of a new team of commercial litigation and finance lawyers.

The firm has been shopping the downtown market for a larger office location. The new office lease — for just two years — will have space for 82 lawyers.

“With the dramatic growth Sidley experienced in Dallas in 2013, we knew all along that additional office space would be required,” Yvette Ostolaza, managing partner of Sidley’s Dallas offices, said Tuesday in a statement.

“We’re where we hoped to be at this point in 2014, and the next step is to move into new space that will allow our world class corporate, litigation, finance, energy, and intellectual property teams to stretch out and continue to grow.”

The Chicago-based firm has more than 1,800 lawyers in 19 offices around the world.

Real estate brokers say that Sidley Austin has shopped for office space in Crescent Real Estate’s new Uptown office tower that will be started soon at McKinney Avenue and Olive Street.

That building won’t be ready until the second half of 2016.

Another major downtown law firm, Gardere Wynne Sewell LLP, has already leased space in Crescent’s building.

Sidley Austin is just the latest in a string of businesses to depart the 34-story KPMG Centre at 717 N. Harwood St.

Tenants including the building’s KPMG and Lockton Cos. have signed leases in other buildings and are moving.

Last month, Austin-based World Class Capital Group bought the 1980s office tower and is working on a redevelopment plan for the building.

Real estate agents say that the new owner is in talks with San Diego-based high-tech firm Omnitracs about moving its operations to the KPMG Centre in a deal that could bring as many as 1,000 new jobs.